Glycidyl methacrylate functionalized star-shaped polylactide for electron beam modification of polylactic acid: Synthesis, irradiation effects and microwave-resistant studies
| Autor: | Kamonwon Haema, Wanvimol Pasanphan, Parichart Kongkaoroptham, Thananchai Piroonpan, Suttinun Phongtamrug |
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| Rok vydání: | 2021 |
| Předmět: |
Glycidyl methacrylate
Acrylate Materials science Polymers and Plastics 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound Crystallinity Polylactic acid chemistry Polymerization Chemical engineering Mechanics of Materials law Materials Chemistry Thermal stability Irradiation Crystallization 0210 nano-technology |
| Zdroj: | Polymer Degradation and Stability. 189:109619 |
| ISSN: | 0141-3910 |
| DOI: | 10.1016/j.polymdegradstab.2021.109619 |
| Popis: | A model of acrylate functionalized polyfunctional star-shaped polylactic acid (star-PLLA) was originally proposed for free radical-induced modification of PLA under electron beams (EB) irradiation. The 4-arms star-PLLA was synthesized by ring-opening polymerization and it was further functionalized with glycidyl methacrylate (GMA). The PLA films containing the star-PLLA-GMA additive were EB-irradiated with the absorbed doses of 10–100 kGy. Effects of the star-PLLA-GMA contents and the absorbed doses on the morphologies, pseudo-gel fraction, swelling degree, chemical structure, molecular weight, G-value, thermal stability, crystallinity, and mechanical properties were demonstrated. The star-PLLA-GMA reduced radiation-induced chain scission of PLA under EB irradiation as known from the G-value of the chain scission (Gs) and the pseudo-gel fraction. The PLA properties, i.e., crystallization, thermal and mechanical characteristics, were improved by the addition of the star-PLLA-GMA and EB irradiation process. The EB-irradiated star-PLLA-GMA/PLA also exhibited an evidence of microwave-resistant property. The reactive multi-branched star-PLLA-GMA and EB irradiation are the promising tailoring models for PLA modification towards the development of microwavable bioplastics for food packaging. |
| Databáze: | OpenAIRE |
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